Compound for treating glass surfaces.



UNITED STATES TIMOTHY J. MURTHA, on NEW Y'QRK, N. Y.

COMPOUND FOR TREATING GLASS SURFACES.

No Drawing.

1 To all whom it may concern:

' in Compounds for Treating Gdass Surfaces,

of which the following is a specification.

The present invention'relates to a compound for treating glass surfacesin order to prevent the'condensation of moisture orvapors upon the same,and thus in cold weather the formation'of frost thereon. The coinpoundisespecially useful when applied to glass panes of show-windows, wherethecondensation of vapor and the formation of frost is objectionable,although it will be easily seen that the compound can be applied to anyother glass surface where the condensation of vapor is foundobjectionable. It may be applied, for instance, to lenses of eye-glassesin order tokeep the same clean in cold weather when the said lenses areusually being covered with vapors or moisture as soon as a person entersa room from outside. It is also found serviceable when applied towindows of railroad enginecabs where the condensation of moisture inconjunction with the smoke that set tles onto the windowvpanes is alwaysobjectionable, and some times a serious matter. The compound consists ofthe following ingredients combined in the proportions stated, which is:

lVater '1 quart Soap chips, preferably white 8 ounces Elm bark 5JQuillai bark 1% Glycerin 24; Potassium carbonate l1} Ammonia water 1%Common salt 2 Alcohol (80% proof) 1% These ingredients are mixed, putupon fire and slowly, boiled for about ten minutes, and then exposed tohigher temperature for about thirty minutes, and thoroughly stirred andagitated while being boiled. An en- Specification of Letters Patent.

Application filed June '28,

Patented May 5, 19 14.

1913. 'Serial no. 776,421.

ameled pot and an enameled ladleshould be used in preparing thecompound. The mixture is then removed from the fire and left to cool forabout twenty-four hours, whereby a hard soapy substance is obtainedwhich is ready for use. I

The above proportions are the preferred ones, it being obvious that somevariations in the proportions can be permitted without destroying thevalue of the compound for the uses above mentioned.

The glass surface to be'treated should be first cleaned and dried, andthe composition then rubbed slightly over this surface. After this theglass is rubbed gently with cheese cloth, or a similar soft material,until it is polished and transparent. Care is to be taken so as not toremove by rubbing the compoundfro-m the glass. The condensation of vaporor moisture upon the surface so treated is efi'ectively guarded against,and the formation of frost is prevented. Obviously the treatment of theglass surface has to be repeated from time to time. Attention is calledto the fact that the compound prevents window panes from being smoked, afunction that is particularly desirablewhen the compound is' applied towindowsof railroad engine cabs.

What I claim is:

faces consisting of water, soap, elm bark,

ammonia water, common salt, and alcohol, in substantially theproportions described.

faces consisting of water one quart, soap eight ounces, elm bark fiveand one-half ounces, quillai bark one and one-half ounces. glycerin twoand one-half ounces, potassium carbonate one and one-half ounces,ammonia water oneand one-half ounces, common salt two ounces, and"alcohol one and one-half ounces,-substantially as described.

TIMOTHY J. MURTH A.

lVitnesses:

THos. F. SCULLY, LILLIAN MARTIN.

1. A compound for treating glass sur-.

quillai bark, glycerin, potassium carbonate,

2. A compound for treating glass sur-

